Under Which Conditions Is a Statistic Said to Be Unbiased

Multiple Choice

Under which conditions is a statistic said to be unbiased?

A) The survey used to obtain the statistic had a low nonresponse rate.
B) The mean of its sampling distribution is equal to the true value of the parameter being estimated.
C) The study had a double-blind design.
D) The sample from which it is computed is a probability sample.